Two divers have been captured on camera rescuing two whale sharks from fisherman nets. In an incredible moment, the whale sharks then swim alongside the divers, to thank them. Marine biologist, New Zealand
born, Simon Pierce captured the release after approaching fisherman off Mafia Island, Tanzania, who were preparing for the rescue.

This is the incredible moment two whale sharks trapped inside a fishing net were set free by divers in Tanzania 

There were two sharks in the net - one 8m long adult and a smaller 5m fish - throughout the dive which took place in November.

The amazing images show divers Chris Rohner and Clare Prebble helping free the tangled pair - which then swim alongside them to say thanks

The mammoth whale sharks, who swam into the nets,  looked like they were being chocked by the fisherman's net 

'They look for schools of fish on the surface and quickly run a net around them.

'The fish are trapped within the loop and the net is pulled in by hand. It's hard, labour-intensive work with 30-50 fishers on each boat.

'If whale sharks are amongst the fish then they often get enclosed in the net themselves.

There were two sharks in the net - one 8m long adult and a smaller 5m fish - throughout the dive which took place in November

Photographer Simon Pierce, from New Zealand, said: 'The main conservation challenge there is conflict between fishermen and sharks

'The fishers use nets to catch small fish and tuna which feed on the same little shrimps the whale sharks eat,' Simon said

'A lot of the sharks have entanglement scars so it's obvious this can be a problem.

'Once the net had been pulled together the whale sharks approached the surface and Chris swam in to check they were okay.

'The larger shark eventually swam right up to the net so the fishers lowered the floats so he could swim across without tangling.

Simon, 35, is the Principal Scientist in charge of the Global Whale Shark Research Program for the Marine Megafauna Foundation

The divers came to the aid of the terrified whale sharks who had become tangled in the gigantic fishing nets 

Two whale sharks became tangled up in this fisherman's net, which attracts small fish the whale shark feeds

Eventually, the whale sharks were set free and followed the divers to thank them. The whole thing was caught on camera by Simon Pierce

The gigantic whale shark was captured in the nets in Tanzania. The whale shark is a vulnerable species. According to Pierce, there are only 30 pups in the world 

'During the day it all worked like the well-practiced operation it is. No damage to the net and the sharks escaped without any injury.

'Mafia is one of the best places in the world to see whale sharks as individual sharks spend a long time in the area.

'It allows us to find them consistently.'